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Figure 4: Graphic representation for the first two axes of the PCA performed with the architectural variables of P. rigida inflorescences. Objects: sampled brevistylous and longistylous inflorescences, the object number indicates the number of the sampled P. rigida shrub. Vectors and Structures: number of floral structures such as open and closed buds, floral abortions, and infrutescences; branch length: total inflorescence length; 1st, 2nd, 3rd, 4th, 5th, and 6th branching: density of primary, secondary, tertiary, quaternary, quinary, and senary branches, respectively.